first check is your phone 32bit because this works only on 64bit and after than if it's 64bit follow this bacuse Maybe u need to update System Webview, Follow this steps if u have old version
1. Install the Trichrome Library: Download and install the Trichrome Library first.
* Trichrome Library v141.0.7390.122
https://www.apkmirror.com/apk/google-inc/trichrome-library/trichrome-library-141...
2. Install System WebView: After installing the Trichrome Library, download and install the System WebView app.
* System Webview v141.0.7390.122
Important:
You must install the Trichrome Library before System WebView for both to install successfully